Ugh, Acestream never seems to buffer for me.
Have you changed the settings as per the wiziwig forum?
1) In the settings you need to set the TS maximum upload speed to the maximum, leave the value "0" (default).
2) In the setting of TS increase buffer Live 2-3 times (20-30 seconds) or more.
3) Then, increase number of peers in 2 times. Maximum number of connections - 400, the maximum number of connections to the stream - 100.
4) If your computer is connected through a router, you must open port 8621.
5) Also, the router to enable UPnP, if it is off.